Cita APA (7a ed.)
Simmons, M., Hiser, D., & Billington, R. A. Trails West. National Geographic Society, Special Publications Division.
Cita estilo Chicago (17a ed.)
Simmons, Marc, David Hiser, y Ray Allen Billington. Trails West. Washington, EUA: National Geographic Society, Special Publications Division.
Cita MLA (9a ed.)
Simmons, Marc, et al. Trails West. National Geographic Society, Special Publications Division.
警告：這些引文格式不一定是100％准確.